Since I need the money I am selling my stock of Siemens ECC86 tubes. These are all NOS/NIB. I have a large quantity of them which was bought at once a long time ago. They are of course factory tested, I can not test them as I don't have a tube tester. Since quality control was tight I don't have any doubts about these. Production of ECC86 started in 1959. These are the 4th revision produced by Valvo Hamburg in 1964.
As this was a very special tube to produce only a few manufacturers could produce them within specifications so rebranding is common with this tube. Tolerances needed to be abnormally low because it is a tube intended for car radio use on 6 or 12V. Most brands bought these from either Philips or Valvo that had a license to produce them. After each production run machines needed to be calibrated again to meet the specifications. This made the tube quite expensive for that time.
They sound excellent in Aikido LV preamps ! I like them a lot as these are tubes that can be run with safe voltages (max. 30V plate voltage !) and they offer very good sound quality. Better than many ECC88 IMHO.
25 Euro/piece ex shipping. Considering the ridiculous shipping costs to the USA etc. I prefer to ship them within Europe only.
datasheet: http://www.drtube.nl/datasheets/ecc86-philips1958.pdf
As this was a very special tube to produce only a few manufacturers could produce them within specifications so rebranding is common with this tube. Tolerances needed to be abnormally low because it is a tube intended for car radio use on 6 or 12V. Most brands bought these from either Philips or Valvo that had a license to produce them. After each production run machines needed to be calibrated again to meet the specifications. This made the tube quite expensive for that time.
They sound excellent in Aikido LV preamps ! I like them a lot as these are tubes that can be run with safe voltages (max. 30V plate voltage !) and they offer very good sound quality. Better than many ECC88 IMHO.
25 Euro/piece ex shipping. Considering the ridiculous shipping costs to the USA etc. I prefer to ship them within Europe only.
datasheet: http://www.drtube.nl/datasheets/ecc86-philips1958.pdf
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The person that can send me a nice one tube cathode follower PCB with integrated volume control, symmetrical power supplies, DC heater supply and muting circuit can have a few for free. Never found the time to design a complete one board design 😉 Design rules can be discussed via PM.
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